Ellison Onizuka Kona International at Keahole in March 2025

86.2%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In March 2025, reporting carriers scheduled 1,397 domestic departures from Ellison Onizuka Kona International at Keahole (KOA). 86.2% left less than 15 minutes late and 85.0% reached their destination on time; 1.9% were cancelled.

Nationally that month, 79.9% of flights departed on time and 79.3% arrived on time, so KOA departures were 6.3 points above the national departure figure.

A year earlier, in March 2024, the airport had 1,382 departures with 92.0% leaving on time: a change of −5.8 points, with flights up 1%.

Flights arriving at KOA that month were on time 86.0% of the time (1,397 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 49%, air carrier 45% and national aviation system 4%.

On time 85.0%
Arrived 15+ minutes late 13.2%
Cancelled 1.9%
Diverted 0.0%

Every scheduled departure from KOA in March 2025, judged by arrival at the destination.

March 2025 against a year earlier, the airport's year and the nation

Measure	Mar 2025	Mar 2024	KOA, 12 months to Jul 2026	All reported flights, Mar 2025
Departed on time	86.2%	92.0%	85.7%	79.9%
Arrived on time	85.0%	90.4%	84.7%	79.3%
Cancelled	1.9%	0.3%	1.1%	1.2%
Average departure delay (late minutes only)	11.8 min	6.7 min	8.7 min	14.9 min
Scheduled departures a day	47	46	44	20,029
Scheduled departures	1,397	1,382	16,052	600,872

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
HA Hawaiian Airlines	681	49%	79.1%	8.6 min	3.5%
WN Southwest Airlines	279	20%	96.8%	-11.0 min	0.0%
AS Alaska Airlines	183	13%	88.5%	-4.6 min	1.1%
UA United Airlines	130	9%	88.5%	-0.1 min	0.0%
AA American Airlines	62	4%	80.6%	34.6 min	0.0%
DL Delta Air Lines	62	4%	82.3%	31.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
KOA–HNL	Kona to Honolulu	693	82.0%	4.9 min	3.5%
KOA–LAX	Kona to Los Angeles	129	84.5%	35.0 min	0.0%
KOA–OGG	Kona to Kahului	125	88.8%	0.4 min	0.0%
KOA–SEA	Kona to Seattle	124	87.1%	-3.3 min	1.6%
KOA–SFO	Kona to San Francisco	62	88.7%	-1.4 min	0.0%
KOA–SMF	Kona to Sacramento	40	90.0%	-6.7 min	0.0%
KOA–DEN	Kona to Denver	31	93.5%	-8.1 min	0.0%
KOA–LAS	Kona to Las Vegas	31	96.8%	-14.8 min	0.0%
KOA–LIH	Kona to Lihue	31	93.5%	-0.4 min	0.0%
KOA–PDX	Kona to Portland	31	96.8%	-14.2 min	0.0%
KOA–PHX	Kona to Phoenix	31	80.6%	-7.0 min	0.0%
KOA–ANC	Kona to Anchorage	23	73.9%	4.7 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), March 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Mar 2025	Minutes
Air carrier	45.3%	33.0%	6,965
Late-arriving aircraft	48.9%	39.2%	7,508
National Aviation System	4.4%	21.9%	671
Extreme weather	1.4%	5.9%	218
Security	0.0%	0.1%	0

15,362 delay minutes on 184 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left KOA on time in March 2025?

86.2% of 1,397 scheduled domestic departures left less than 15 minutes late, and 85.0% reached their destination on time. The national figures that month were 79.9% and 79.3%.

How does that compare with a year earlier?

In March 2024, 92.0% of 1,382 departures left on time and 0.3% were cancelled, against 86.2% and 1.9% in March 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for March 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for KOA · methodology · corrections.